<template>
  <view>
 <view class="searcch-box">
      <uni-search-bar @input="input" :radius="100" cancelButton = "none"></uni-search-bar>
    </view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list"  v-if="searchResults.length !== 0">
      <view 
      v-for="(item,i) in searchResults"
      :key="i"
      class="sugg-item"
       @click="gotoDetail(item.goods_id)">
         <view class="goods-name">{{item.goods_name}}</view>
            <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
         <uni-icons type="trash" size="16" @click="clean"></uni-icons>
      </view>
        <!-- 列表区域 -->
        <view class="history-list">
          <uni-tag
          @click="gotoGoodsList(item)"
          v-for="(item,i) in histories"
          :key="i"
          :text="item"
           ></uni-tag>
        </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
           // 延时器的 timerId
         timer: null,
           // 搜索关键词
             kw: '',
                // 搜索结果列表
            searchResults: [],
            // 搜索关键词的历史记录
                historyList: []
      };
    },
    onLoad() {
      this.historyList=JSON.parse(uni.getStorageSync('kw') || [])
    },
    methods:{
      input(e){
          // console.log(e);
            clearTimeout(this.timer)
            this.timer =setTimeout(()=>{
              this.kw=e
              // console.log(this.kw);
              this.getSearchList()
            },500)
      },
      async getSearchList(){
        if(this.kw===''){
           this.searchResults=[]
           return
        }
        const {data:res}=await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status!==200) return uni.$showMsg()
          this.searchResults = res.message
          
            // 1. 查询到搜索建议之后，调用 saveSearchHistory() 方法保存搜索关键词
               this.saveSearchHistory()
        // console.log(res);
        // console.log(this.searchResults);
       
      },
      gotoDetail(goods_id){
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
        })
      },
      saveSearchHistory(){
         this.historyList.push(this.kw)
         this.historyList=Array.from(new Set(this.historyList))
         // 数据持久化
         uni.setStorageSync('kw', JSON.stringify(this.historyList));
      },
      clean(){
        this. historyList=[]
         uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(kw){
         uni.navigateTo({
            url: '/subpkg/goods_list/goods_list?query=' + kw
          })
      }
    },
    computed :{
      histories(){
       return [...this.historyList].reverse()
      }
    }
  }
</script>

<style lang="scss">
.searcch-box{
  position: static;
  top: 0;
   z-index: 999;
}
.sugg-list {
  padding: 0 5px;
   .sugg-item {
      font-size: 12px;
       padding: 13px 0;
      border-bottom: 1px solid #efefef;
      display: flex;
      // text-align: center;
      justify-content: space-between;
      align-items: center;
       .goods-name {
         // 文字不允许换行（单行文本）
               white-space: nowrap;
                 // 溢出部分隐藏
                     overflow: hidden;
                        // 文本溢出后，使用 ... 代替
                           text-overflow: ellipsis;
                           margin-right: 3px;
       }
   }
}
.history-box {
  padding: 0 5px;
    .history-title {
       display: flex;
          justify-content: space-between;
          align-items: center;
          height: 40px;
          font-size: 13px;
          border-bottom: 1px solid #efefef;
    }
      .history-list {
        display: flex;
        flex-wrap: wrap;
    
        .uni-tag {
          margin-top: 5px;
          margin-right: 5px;
        }
      }
  }
  
</style>
